﻿/*
 * Twipler - Twitter Web Client with features.
 *  
 *  Copyright (C) 2009, 2010. Ian Quigley
 * 
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details. 
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>. 
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace Twipler.App.Machine.Instructions
{
    [InstructionAttibute("Greater than integer", pops = 2, pushes = 1)]
    public class GtI : Instruction
    {
        public override void Exec(Environment env)
        {
            if (env.Stack.Count() < 2)
            {
                env.Errors.Add("GtI - stack underflow");
                return;
            }

            env.Stack.Push((bool)((int)env.Stack.Pop() < (int)env.Stack.Pop()));
        } 
    }
}